[{"data":1,"prerenderedAt":734},["ShallowReactive",2],{"site-footer-common":3,"glossary:diaphragm-replacement-sonic-horn":45,"glossary-related:diaphragm-replacement-sonic-horn":230},{"id":4,"extension":5,"footer":6,"meta":40,"navbar":41,"stem":43,"__hash__":44},"common\u002Fcommon.yml","yml",{"tagline":7,"links":8,"sections":9},"Acoustic cleaning intelligence for industrial fouling, soot, ash, dust and build-up.",[],[10,19,31],{"title":11,"links":12},"Product",[13,16],{"label":14,"to":15},"How it works","\u002F#product",{"label":17,"to":18},"Cost assessment","\u002F#hero",{"title":20,"links":21},"Company",[22,25,28],{"label":23,"to":24},"What we build","\u002F#about",{"label":26,"to":27},"Careers","\u002F#careers",{"label":29,"to":30},"Contact","\u002F#contact",{"title":32,"links":33},"Resources",[34,37],{"label":35,"to":36},"Blog","\u002Fresources\u002Fblog",{"label":38,"to":39},"Glossary","\u002Fglossary",{},{"links":42},[],"common","YocmZRy1AYfBbpgGVms-zhdiABlF8VTxHx6h4rDmZBA",{"id":46,"title":47,"aliases":48,"body":51,"category":211,"description":212,"extension":213,"meta":214,"navigation":215,"path":216,"relatedTerms":217,"seo":221,"sources":224,"stem":228,"term":60,"__hash__":229},"glossary\u002Fglossary\u002Fdiaphragm-replacement-sonic-horn.md","Diaphragm replacement (sonic horn)",[49,50],"diaphragm change-out","sonic horn diaphragm replacement",{"type":52,"value":53,"toc":203},"minimark",[54,68,73,131,134,154,158,166,170,177,181],[55,56,57,61,62,67],"p",{},[58,59,60],"strong",{},"Diaphragm replacement"," is the routine maintenance task for industrial ",[63,64,66],"a",{"href":65},"\u002Fglossary\u002Fsonic-horn","sonic horns"," — the only consumable wear part in most horn designs.",[69,70,72],"h2",{"id":71},"typical-service-intervals","Typical service intervals",[74,75,76,89],"table",{},[77,78,79],"thead",{},[80,81,82,86],"tr",{},[83,84,85],"th",{},"Diaphragm material",[83,87,88],{},"Service life (continuous duty)",[90,91,92,104,115,123],"tbody",{},[80,93,94,101],{},[95,96,97],"td",{},[63,98,100],{"href":99},"\u002Fglossary\u002Ftitanium-diaphragm","Titanium",[95,102,103],{},"3–5 years",[80,105,106,112],{},[95,107,108],{},[63,109,111],{"href":110},"\u002Fglossary\u002Faisi-316-316l-stainless","316 stainless",[95,113,114],{},"1.5–3 years",[80,116,117,120],{},[95,118,119],{},"Hot-side stainless",[95,121,122],{},"1–2 years",[80,124,125,128],{},[95,126,127],{},"Severe-service titanium",[95,129,130],{},"2–3 years",[55,132,133],{},"Diaphragm life is determined primarily by:",[135,136,137,141,144,151],"ul",{},[138,139,140],"li",{},"Operating temperature at the horn body",[138,142,143],{},"Aggressiveness of the gas chemistry that diffuses past the diaphragm during off-cycles",[138,145,146,150],{},[63,147,149],{"href":148},"\u002Fglossary\u002Fcompressed-air","Compressed-air"," quality",[138,152,153],{},"Cycle duty (more frequent firing → faster cumulative fatigue)",[69,155,157],{"id":156},"replacement-procedure","Replacement procedure",[55,159,160,161,165],{},"A typical ",[63,162,164],{"href":163},"\u002Fglossary\u002Fdiaphragm-horn","diaphragm-horn"," replacement involves isolating the air supply, removing the drive housing, withdrawing the spent diaphragm, inspecting the seat, fitting the replacement, reassembling the drive housing and verifying SPL output. The whole task is field-completable in under an hour per horn during a routine outage.",[69,167,169],{"id":168},"predictive-maintenance-integration","Predictive-maintenance integration",[55,171,172,176],{},[63,173,175],{"href":174},"\u002Fglossary\u002Fpredictive-maintenance","Predictive maintenance (PdM)"," systems can monitor sonic-horn SPL output via a microphone or in-line pressure sensor and flag the gradual drift that signals impending diaphragm replacement, allowing maintenance scheduling well before output drops materially.",[69,178,180],{"id":179},"related-terms","Related terms",[135,182,183,188,193,198],{},[138,184,185],{},[63,186,187],{"href":163},"Diaphragm horn",[138,189,190],{},[63,191,192],{"href":99},"Titanium diaphragm",[138,194,195],{},[63,196,197],{"href":65},"Sonic horn",[138,199,200],{},[63,201,202],{"href":174},"Predictive maintenance",{"title":204,"searchDepth":205,"depth":205,"links":206},"",2,[207,208,209,210],{"id":71,"depth":205,"text":72},{"id":156,"depth":205,"text":157},{"id":168,"depth":205,"text":169},{"id":179,"depth":205,"text":180},"controls-ancillaries","Diaphragm replacement is the routine maintenance task for industrial sonic horns — the only consumable wear part in most horn designs.","md",{},true,"\u002Fglossary\u002Fdiaphragm-replacement-sonic-horn",[164,218,219,220],"titanium-diaphragm","sonic-horn","predictive-maintenance",{"title":222,"description":223},"Diaphragm replacement — the routine maintenance task for industrial sonic horns","Diaphragm replacement is the routine maintenance task for industrial sonic horns. Typical interval 3–5 years for titanium, 1.5–3 years for stainless. Field-replaceable in under an hour.",[225],{"title":226,"url":227},"Power Engineering — Sonic Horns: A User's Introduction","https:\u002F\u002Fwww.power-eng.com\u002Fcoal\u002Fsonic-horns-a-userrsquos-introduction\u002F","glossary\u002Fdiaphragm-replacement-sonic-horn","FFvMnEVEWy5kR5OZUJ7RUJiVhrxr47VrlDdXP0DVlyQ",[231,342,417,639],{"id":232,"title":187,"aliases":233,"body":236,"category":325,"description":326,"extension":213,"meta":327,"navigation":215,"path":163,"relatedTerms":328,"seo":332,"sources":335,"stem":340,"term":187,"__hash__":341},"glossary\u002Fglossary\u002Fdiaphragm-horn.md",[234,235],"diaphragm sonic horn","diaphragm-driven horn",{"type":52,"value":237,"toc":319},[238,262,266,274,278,281,285,297,299],[55,239,240,241,244,245,248,249,252,253,256,257,261],{},"A ",[58,242,243],{},"diaphragm horn"," is a ",[63,246,247],{"href":65},"sonic horn"," in which the cleaning sound is produced by a metal diaphragm vibrating at its design frequency under pulsed compressed-air pressure. The diaphragm — typically ",[63,250,251],{"href":99},"titanium"," or ",[63,254,255],{"href":110},"316 stainless steel"," — sits between the air-supply chamber and the throat of the ",[63,258,260],{"href":259},"\u002Fglossary\u002Fbell-horn","bell horn"," and is the part most exposed to wear.",[69,263,265],{"id":264},"how-it-generates-sound","How it generates sound",[55,267,268,269,273],{},"Compressed air admitted by a ",[63,270,272],{"href":271},"\u002Fglossary\u002Fsolenoid-valve","solenoid valve"," raises pressure behind the diaphragm. At the design frequency the diaphragm flexes inward, vents the chamber, snaps back under spring tension, re-pressurises and repeats — a self-sustaining oscillation that converts steady air supply into a tonal acoustic output. The bell then amplifies and projects the wave into the vessel.",[69,275,277],{"id":276},"why-it-dominates-the-market","Why it dominates the market",[55,279,280],{},"Most low-to-mid-frequency industrial sonic horns are diaphragm-driven because the design is mechanically simple, tolerates rough industrial air, sustains 140 to 180 dB output without auxiliary power, and the only routine wear part — the diaphragm — is field-replaceable in under an hour. Titanium diaphragms typically last three to five years under normal duty before output drift signals a replacement.",[69,282,284],{"id":283},"diaphragm-horn-vs-piston-whistle-horn","Diaphragm horn vs piston-whistle horn",[55,286,287,291,292,296],{},[63,288,290],{"href":289},"\u002Fglossary\u002Fpiston-whistle-horn","Piston-whistle horns"," use a moving piston-and-whistle assembly rather than a flexing diaphragm. They tend to operate at higher frequencies and shorter dwell times, suit fine dust loads in ",[63,293,295],{"href":294},"\u002Fglossary\u002Ffabric-filter","fabric filters",", and have a different wear profile. Diaphragm horns dominate the 60–250 Hz band; piston-whistle and related designs are more common above 250 Hz.",[69,298,180],{"id":179},[135,300,301,305,310,315],{},[138,302,303],{},[63,304,197],{"href":65},[138,306,307],{},[63,308,309],{"href":259},"Bell horn",[138,311,312],{},[63,313,314],{"href":289},"Piston-whistle horn",[138,316,317],{},[63,318,192],{"href":99},{"title":204,"searchDepth":205,"depth":205,"links":320},[321,322,323,324],{"id":264,"depth":205,"text":265},{"id":276,"depth":205,"text":277},{"id":283,"depth":205,"text":284},{"id":179,"depth":205,"text":180},"core-technology","A diaphragm horn is a sonic horn in which the cleaning sound is produced by a metal diaphragm vibrating at its design frequency under pulsed compressed-air pressure. The diaphragm — typically titanium or 316 stainless steel — sits between the air-supply chamber and the throat of the bell horn and is the part most exposed to wear.",{},[219,329,330,218,331],"bell-horn","piston-whistle-horn","low-frequency-acoustic-cleaner",{"title":333,"description":334},"Diaphragm horn — driver type, materials and typical frequencies","A diaphragm horn is a sonic horn whose sound is generated by a vibrating titanium or stainless-steel diaphragm driven by pulsed compressed air. The dominant form-factor for low-frequency industrial cleaning.",[336,337],{"title":226,"url":227},{"title":338,"url":339},"Wikipedia — Acoustic cleaning","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAcoustic_cleaning","glossary\u002Fdiaphragm-horn","dtvm3Iiw8hZJrGOuS4cubbp0rZvl9thGaUD53Ulu_k4",{"id":343,"title":192,"aliases":344,"body":347,"category":402,"description":403,"extension":213,"meta":404,"navigation":215,"path":99,"relatedTerms":405,"seo":408,"sources":411,"stem":415,"term":192,"__hash__":416},"glossary\u002Fglossary\u002Ftitanium-diaphragm.md",[345,346],"Ti diaphragm","titanium driver diaphragm",{"type":52,"value":348,"toc":397},[349,358,362,369,373,380,382],[55,350,240,351,354,355,357],{},[58,352,353],{},"titanium diaphragm"," is the premium driver element in many industrial ",[63,356,66],{"href":65},". Titanium's high strength-to-weight ratio, fatigue resistance and corrosion immunity to most flue-gas chemistries make it the longest-lived diaphragm material available.",[69,359,361],{"id":360},"service-life","Service life",[55,363,364,365,368],{},"A well-installed titanium diaphragm in typical industrial duty lasts 3–5 years of continuous service before replacement, with shorter life in particularly aggressive (high-chloride, high-temperature) applications and longer life in cooler or less corrosive duty. The ",[63,366,367],{"href":110},"stainless-steel"," alternative typically lasts 1.5–3 years in the same service.",[69,370,372],{"id":371},"replacement-is-straightforward","Replacement is straightforward",[55,374,375,376,379],{},"A scheduled ",[63,377,378],{"href":216},"diaphragm replacement"," is a routine planned-maintenance task typically completed in under an hour per horn during a normal outage. Diaphragm degradation shows up as gradual SPL drift — instrumented horns flag the trend before output drops materially.",[69,381,180],{"id":179},[135,383,384,388,392],{},[138,385,386],{},[63,387,187],{"href":163},[138,389,390],{},[63,391,47],{"href":216},[138,393,394],{},[63,395,396],{"href":110},"AISI 316 \u002F 316L stainless",{"title":204,"searchDepth":205,"depth":205,"links":398},[399,400,401],{"id":360,"depth":205,"text":361},{"id":371,"depth":205,"text":372},{"id":179,"depth":205,"text":180},"materials-construction","A titanium diaphragm is the premium driver element in many industrial sonic horns. Titanium's high strength-to-weight ratio, fatigue resistance and corrosion immunity to most flue-gas chemistries make it the longest-lived diaphragm material available.",{},[164,406,407],"diaphragm-replacement-sonic-horn","aisi-316-316l-stainless",{"title":409,"description":410},"Titanium diaphragm — premium driver for industrial sonic horns","Titanium diaphragms provide the longest service life in industrial sonic horns — typically 3–5 years of continuous duty before replacement.",[412],{"title":413,"url":414},"Wikipedia — Titanium","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FTitanium","glossary\u002Ftitanium-diaphragm","ft6GLfyFaZbTgQM6DdCpvlhKStCcpB2RKbJ2KQzofjo",{"id":418,"title":197,"aliases":419,"body":422,"category":325,"description":620,"extension":213,"meta":621,"navigation":215,"path":65,"relatedTerms":622,"seo":626,"sources":629,"stem":637,"term":197,"__hash__":638},"glossary\u002Fglossary\u002Fsonic-horn.md",[66,420,421],"sonic cleaning horn","industrial sonic horn",{"type":52,"value":423,"toc":613},[424,456,460,466,470,532,536,573,577,585,587],[55,425,240,426,428,429,433,434,438,439,438,442,438,446,450,451,455],{},[58,427,247],{}," is a pneumatically-driven sound emitter that produces high-intensity, low-frequency sound waves — typically between 60 and 400 Hz at sound pressure levels of 140 to 180 dB — used to dislodge particulate fouling from inside industrial process equipment. Sonic horns are the most common form of ",[63,430,432],{"href":431},"\u002Fglossary\u002Facoustic-cleaner","acoustic cleaner"," and the default specification for cleaning ",[63,435,437],{"href":436},"\u002Fglossary\u002Felectrostatic-precipitator","ESPs",", ",[63,440,441],{"href":294},"baghouses",[63,443,445],{"href":444},"\u002Fglossary\u002Fselective-catalytic-reduction","SCR catalysts",[63,447,449],{"href":448},"\u002Fglossary\u002Fsuperheater","boiler heat-transfer surfaces"," and ",[63,452,454],{"href":453},"\u002Fglossary\u002Fhopper","hoppers and silos",".",[69,457,459],{"id":458},"how-a-sonic-horn-works","How a sonic horn works",[55,461,462,463,465],{},"Compressed plant air admitted through a ",[63,464,272],{"href":271}," drives a metal diaphragm — typically titanium or 316 stainless — into resonant oscillation at the horn's fundamental frequency. The oscillating pressure field is amplified by an exponential bell horn and projected into the vessel as a near-spherical sound wave. Particulate already deposited on internal surfaces receives an oscillating acceleration that overcomes adhesion; loosened material is then carried out with the gas flow before it can sinter, bridge or bond. Because the cleaning is acoustic and non-contact, the horn can fire while the plant is online without tube erosion, refractory damage or thermal shock.",[69,467,469],{"id":468},"key-parameters","Key parameters",[74,471,472,482],{},[77,473,474],{},[80,475,476,479],{},[83,477,478],{},"Parameter",[83,480,481],{},"Typical range",[90,483,484,492,500,508,516,524],{},[80,485,486,489],{},[95,487,488],{},"Fundamental frequency",[95,490,491],{},"60–400 Hz",[80,493,494,497],{},[95,495,496],{},"Sound pressure level",[95,498,499],{},"140–180 dB",[80,501,502,505],{},[95,503,504],{},"Compressed-air consumption",[95,506,507],{},"8–14 Nm³\u002Fmin at 4–7 bar",[80,509,510,513],{},[95,511,512],{},"Operating temperature (with appropriate materials)",[95,514,515],{},"−40 °C to +500 °C",[80,517,518,521],{},[95,519,520],{},"Firing cycle",[95,522,523],{},"5–15 s burst, repeated every 3–15 minutes",[80,525,526,529],{},[95,527,528],{},"Mass",[95,530,531],{},"15–60 kg depending on horn size",[69,533,535],{"id":534},"frequency-selection","Frequency selection",[55,537,538,539,438,543,547,548,438,552,556,557,438,560,564,565,450,569,455],{},"Lower frequencies (60–125 Hz) project longer wavelengths and penetrate further into large open vessels — ",[63,540,542],{"href":541},"\u002Fglossary\u002Fpreheater-cyclone","preheater cyclones",[63,544,546],{"href":545},"\u002Fglossary\u002Frecovery-boiler","recovery-boiler superheaters",", large ",[63,549,551],{"href":550},"\u002Fglossary\u002Fesp-field-bus-section","ESP fields",[63,553,555],{"href":554},"\u002Fglossary\u002Fsilo","silos",". Higher frequencies (230–400 Hz) carry more energy per unit volume and suit finer dust loads in ",[63,558,559],{"href":294},"fabric-filter compartments",[63,561,563],{"href":562},"\u002Fglossary\u002Fhoneycomb-catalyst","catalyst layers"," and smaller hopper geometries. See ",[63,566,568],{"href":567},"\u002Fglossary\u002Flow-frequency-acoustic-cleaner","low-frequency acoustic cleaner",[63,570,572],{"href":571},"\u002Fglossary\u002Fhigh-frequency-acoustic-cleaner","high-frequency acoustic cleaner",[69,574,576],{"id":575},"sonic-horn-vs-steam-sootblower","Sonic horn vs steam sootblower",[55,578,579,580,584],{},"Sonic horns are increasingly specified alongside or in place of ",[63,581,583],{"href":582},"\u002Fglossary\u002Fsteam-sootblower","steam sootblowers"," because they consume no boiler-grade steam, cause no tube erosion, require almost no moving parts and can fire every few minutes without operator intervention. They are less effective on hard, fused slag than retractable steam lances, so on furnace waterwalls and high-temperature superheaters they typically complement rather than replace mechanical cleaning.",[69,586,180],{"id":179},[135,588,589,594,600,604,608],{},[138,590,591],{},[63,592,593],{"href":431},"Acoustic cleaner",[138,595,596],{},[63,597,599],{"href":598},"\u002Fglossary\u002Fsonic-sootblower","Sonic sootblower",[138,601,602],{},[63,603,309],{"href":259},[138,605,606],{},[63,607,187],{"href":163},[138,609,610],{},[63,611,612],{"href":567},"Low-frequency acoustic cleaner",{"title":204,"searchDepth":205,"depth":205,"links":614},[615,616,617,618,619],{"id":458,"depth":205,"text":459},{"id":468,"depth":205,"text":469},{"id":534,"depth":205,"text":535},{"id":575,"depth":205,"text":576},{"id":179,"depth":205,"text":180},"A sonic horn is a pneumatically-driven sound emitter that produces high-intensity, low-frequency sound waves — typically between 60 and 400 Hz at sound pressure levels of 140 to 180 dB — used to dislodge particulate fouling from inside industrial process equipment. Sonic horns are the most common form of acoustic cleaner and the default specification for cleaning ESPs, baghouses, SCR catalysts, boiler heat-transfer surfaces and hoppers and silos.",{},[623,624,625,329,164,331],"acoustic-cleaner","acoustic-cleaning-system","sonic-sootblower",{"title":627,"description":628},"Sonic horn — definition, frequency, SPL and industrial applications","A sonic horn is a pneumatically-driven low-frequency sound emitter (typically 60–400 Hz at 140–180 dB SPL) used to dislodge particulate fouling from boilers, ESPs, baghouses and process vessels.",[630,631,634],{"title":226,"url":227},{"title":632,"url":633},"Power Engineering — Tuning in to Acoustic Cleaning","https:\u002F\u002Fwww.power-eng.com\u002Fcoal\u002Ftuning-in-to-acoustic-cleaning\u002F",{"title":635,"url":636},"Wikipedia — Sonic soot blowers","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSonic_soot_blowers","glossary\u002Fsonic-horn","YzrhN0kKzqSaQo0wfn0rueNZ-V43mcg5zahqeWi3lnU",{"id":640,"title":175,"aliases":641,"body":645,"category":211,"description":720,"extension":213,"meta":721,"navigation":215,"path":174,"relatedTerms":722,"seo":725,"sources":728,"stem":732,"term":202,"__hash__":733},"glossary\u002Fglossary\u002Fpredictive-maintenance.md",[642,643,644],"PdM","predictive maintenance","condition-based maintenance",{"type":52,"value":646,"toc":716},[647,652,656,659,690,696,698],[55,648,649,651],{},[58,650,175],{}," schedules service based on actual equipment-condition signals — vibration, temperature, acoustic output, oil analysis — rather than fixed time-based intervals. PdM reduces unnecessary maintenance, defers replacements until they are really needed, and gives advance warning of impending failures.",[69,653,655],{"id":654},"pdm-for-sonic-horns","PdM for sonic horns",[55,657,658],{},"PdM is increasingly applied to sonic-horn cleaning systems:",[135,660,661,672,678,684],{},[138,662,663,666,667,671],{},[58,664,665],{},"Acoustic-output monitoring"," — a microphone or in-line pressure transducer trends the horn's ",[63,668,670],{"href":669},"\u002Fglossary\u002Fsound-pressure-level","SPL"," over time",[138,673,674,677],{},[58,675,676],{},"Air-consumption monitoring"," — flow meters detect changes in horn behaviour",[138,679,680,683],{},[58,681,682],{},"Firing-count tracking"," — cumulative cycle count for diaphragm-life prediction",[138,685,686,689],{},[58,687,688],{},"Cycle-time analysis"," — slower or faster diaphragm action signals component drift",[55,691,692,693,695],{},"Trend analysis flags the gradual SPL drift that signals impending ",[63,694,378],{"href":216},", allowing maintenance to be scheduled into a routine outage rather than triggered by a sudden failure.",[69,697,180],{"id":179},[135,699,700,706,712],{},[138,701,702],{},[63,703,705],{"href":704},"\u002Fglossary\u002Freliability-centred-maintenance","Reliability-centred maintenance (RCM)",[138,707,708],{},[63,709,711],{"href":710},"\u002Fglossary\u002Fmtbf","MTBF",[138,713,714],{},[63,715,47],{"href":216},{"title":204,"searchDepth":205,"depth":205,"links":717},[718,719],{"id":654,"depth":205,"text":655},{"id":179,"depth":205,"text":180},"Predictive maintenance (PdM) schedules service based on actual equipment-condition signals — vibration, temperature, acoustic output, oil analysis — rather than fixed time-based intervals. PdM reduces unnecessary maintenance, defers replacements until they are really needed, and gives advance warning of impending failures.",{},[723,724,406],"reliability-centred-maintenance","mtbf",{"title":726,"description":727},"Predictive maintenance (PdM) — condition-driven maintenance based on equipment health monitoring","Predictive maintenance schedules service based on actual equipment-condition signals rather than fixed time intervals. Increasingly applied to sonic-horn cleaning systems via SPL trend monitoring.",[729],{"title":730,"url":731},"Wikipedia — Predictive maintenance","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPredictive_maintenance","glossary\u002Fpredictive-maintenance","lKLGnLTMOyr31NvaXRhVW51nqElM-RzUyGHTgSw_OFM",1782613729253]